On Jun. 29, 2020, JAMA reported that U.S. populationﾖbased time series analysis conducted between March 9, 2020, and May 7, 2020, school closure was associated with a significant decline in both incidence of COVID-19 and mortality (adjusted relative change per week.

COVID-19 cumulative incidence in states at the time of school closure ranged from 0 to 14.75 cases per 100ﾠ000 population. School closure was associated with a significant decline in the incidence of COVID-19